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Finding the Fourth Proportional to 14,612.60, 20,163.74 and 8,642.09

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Solution

The fourth proportional to 14,612.60, 20,163.74 and 8,642.09 is: 11,925.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,612.60 : 20,163.74 = 8,642.09 : x
  2. Step 2: Convert to fraction form
    14,612.60/20,163.74 = 8,642.09/x
  3. Step 3: Cross multiply
    14,612.60x = 20,163.74 × 8,642.09
  4. Step 4: Simplify right side
    14,612.60x = 174,256,863.02
  5. Step 5: Solve for x
    x = 174,256,863.02/14,612.60
  6. Step 6: Final answer
    x = 11,925.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.